The new BM-1 Series of pickups was designed with a lengthened sensor element to enable it work properly on the bridges of Bouzouki"s, Mandola"s, Flat-top Mandolins and Citterns that traditionally have a wider string spacing format than a standard mandolin. This series of pickups allows you to add a pickup system to your instrument without having to change the bridge or modify anything . Featuring Schatten"s new MVC jack assembly (which simply attaches to the underside of the existing tailpiece), the BM-1 offers a real alternative to pickups that require bridge replacement.The BM-1 pickup provides clean, clear sound reproduction. This pickup has been designed to operate properly and sound good without the use of a preamp when plugged into any "normal" amp (guitar amp, bass amp, etc.). As with any pickup, the sound can be further enhanced and EQ"d with an outboard preamp. If you require the added ability to be able to plug directly into a P.A. or mixer on a regular or occasional basis, then you may wish to add the Schatten Preamp/DI (not included) to your pickup system. The BM-1 sensor is small and light in weight. 1/4" wide by 2 1/4" in length and will not affect the acoustic sound of the instrument. It will work on virtually all of these instrument"s bridges, adjustable or fixed, and only requires a small flat area on the bridge face for the sensor to adhere to. The pickup adheres to the bridge with VHB foam tape (included). The jack assembly simply adheres to the underside of the tailpiece. No modifications are required to the bridge or the tailpiece, and the system is completely removable.